fix(auto_attack): Fixed all Towers that relied on `GetAttackRange` that 7.20 broke.

[nokusukun]

These towers include...

• Cannon Tower
  • A mild bug in regards to the targeting code.
• Periodic Tower
  • Fixed broken OnAttack code.
• Gunpowder Tower, Ice Tower, Runic Tower
  • Fixed targeting code.
• Windstorm Tower
  • Fixed the autoattacks.

[nokusukun]

This should be ready to go, at least it's reverted to it's pre 7.20 state.